user
Write a response that appropriately completes the request.

### Instruction:
Design an app that fitness enthusiasts can use

### Response:
assistant
The app should provide users with a comprehensive platform to manage and track their fitness goals. Features should include: 
- Activity tracking, including walking, running, biking, swimming, gym workouts, etc.
- Customizable and trackable goals, with reminders and notifications.
- Easy-to-understand nutrition tracking with meal plans.
- Customizable exercise routines, with options to save and share with others.
- Social features that allow users to connect with like-minded people and share their progress.
- Tools for progress tracking and performance assessments that allow users to review and monitor their progress.